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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-04-23 13:58:08 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-04-23 13:58:17 +0200
commite1c805309d19c69d4ebeac38724076fa86feacdf (patch)
tree73886783aac7c489a29f3e5eec56cbc2371a12dd /arch/s390/include/asm/cputime.h
parentb1ad171efa089ae26aba750d747d8149a4f860d5 (diff)
downloadop-kernel-dev-e1c805309d19c69d4ebeac38724076fa86feacdf.zip
op-kernel-dev-e1c805309d19c69d4ebeac38724076fa86feacdf.tar.gz
[S390] /proc/stat idle field for idle cpus
The cpu idle field in the output of /proc/stat is too small for cpus that have been idle for more than a tick. Add the architecture hook arch_idle_time that allows to add the not accounted idle time of a sleeping cpu without waking the cpu. The s390 implementation of arch_idle_time uses the already existing s390_idle_data per_cpu variable to find the sleep time of a neighboring idle cpu. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/cputime.h')
-rw-r--r--arch/s390/include/asm/cputime.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index 95b0f7d..941384f 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -174,4 +174,8 @@ cputime64_to_clock_t(cputime64_t cputime)
return __div(cputime, 4096000000ULL / USER_HZ);
}
+cputime64_t s390_get_idle_time(int cpu);
+
+#define arch_idle_time(cpu) s390_get_idle_time(cpu)
+
#endif /* _S390_CPUTIME_H */
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